Unknown receiver 'AFHTTPRequestOperation' ; did you mean 'AFHTTPRequestSerializer' - ios

Question

I am learning AFNetworking kit. I followed this tutorial. Now I stuck at comment 2 see code below AFHTTPRequestOperation.
I imported AFNetworking using cocoapods.
Here is my code:
- (IBAction)jsonTapped:(id)sender{
// comment 1
NSString *string = [NSString stringWithFormat:#"%#weather.php?format=json", BaseURLString];
NSURL *url = [NSURL URLWithString:string];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// comment 2
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
// comment 3
self.weather = (NSDictionary *)responseObject;
self.title = #"JSON Retrieved";
[self.tableView reloadData];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
// comment 4
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Error Retrieving Weather"
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alertView show];
}];
// comment 5
[operation start];
}
Now getting error at compile time see screen shot:

Answer 1

Please make sure that you included AFNetworking properly inside your project before you import any of the AFNetworking class. Probably you have not imported the kit properly.
Dont use UIAlertView which is deprecated iOS 9 use UIAlertController see code below.
UIAlertController *alert = [UIAlertController alertControllerWithTitle:#"Title" message:#"text mssg" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:#"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action){
// Ok action code here
}];
UIAlertAction *otherAction = [UIAlertAction actionWithTitle:#"Other" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action){
// Other action code here
}];
[alert addAction:okAction];
[alert addAction:otherAction];
[self presentViewController:alert animated:YES completion:nil];

Answer 2

You can use AFHTTPRequestOperationManager
- (void)apiRequestForPOSTWithServiceName:(NSString *)serviceName andParameters:(NSDictionary *)parameter withCompletion:(void(^)(id response, BOOL isSuccess))completion
{
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
NSString *url = [NSString stringWithFormat:#"%#%#", BASE_URL, serviceName];
[manager POST:url parameters:parameter success:^(AFHTTPRequestOperation *operation, id responseObject) {
//NSLog(#"JSON: %#", responseObject);
completion(responseObject,YES);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
completion(error,NO);
}];
}
Happy coding...!!